exam:Back:Rn:negative:
According to [1]} and defn:BregmanDistance,
\(\left(\forall \lbrace u,v\rbrace  \subseteq \left[0, +\infty \right[^{n} \right)\quad D_{f} (u,v) =\sum ^{n}_{i=1} u_{i} (\ln (u_{i}) -\ln (v_{i})) +v_{i} -u_{i} .\) 
